Survex 1.2.38 released

Survex 1.2.38 is now available:
https://survex.com/download.html
This is not a very exciting release - mostly I wanted to address the
incorrect definition of "mils". I suspect nobody is actually using
them as for bearings, you'd get a warning about the value being too
large for about 93% of readings. But for clino readings it might
escape notice.
Here's the full NEWS file entry for this release:
Changes in 1.2.38 (2019-03-02):
* cavern:
+ Deprecate MILS as angular units. Survex has long support MILS as an alias
for GRADS. However, this seems to be a bogus definition of a "mil" which
is unique to Survex (except that Therion has since copied it) - there are
several different definitions of a "mil" but they vary from 6000 to 6400 in
a full circle, not 400. Reported by Andy Edwards.
+ Fix segfault for *include "". This isn't useful, but shouldn't crash. It
now reports "file not found" instead.
+ Use isnan() to check for not-a-number. This is cleaner, more robust and
more efficient than formatting the number as a string and checking for
"NaN" or "nan" in the result.
* Avoid unused variable warning when compiling from source with modern ffmpeg.
* Drop support for wxWidgets < 3.0. 3.0.0 was released over 5 years ago and
should be easily available everywhere by now. I'm no longer easily able to
test with wxWidgets 2.8, and this allows a significant amount of cruft to be
removed.
* (Linux version): survex.spec: Fedora have removed gcc from the default build
environment so need to explicitly list it in the BuildRequires tag. See
https://fedoraproject.org/wiki/Changes/Remove_GCC_from_BuildRoot for more
information. Patch from James Begley.
Here are SHA256 checksums should you want to verify the integrity of the
files:
70920158d2a309d872080f3f5ad3e2bcac212f34803fd869cfff90f6c25a685a survex-1.2.38.tar.gz
55bc4ff4d11060c764e496b6ab93768f7c477a7daaa4ff4e23c021c30999ba6d survex-win32-1.2.38.exe
There are also detached GPG signatures in the download directory:
https://survex.com/software/1.2.38/
There are "release notes" on the wiki, which I'll try to keep updated
with any issues found, so take a look there for the latest information:
https://trac.survex.com/wiki/ReleaseNotes/1.2.38
Please report any issues you find which are not covered in the release
notes to the bug tracker (https://trac.survex.com/).
Cheers,
Olly
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